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US20060000530A1 - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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Publication number
US20060000530A1
US20060000530A1 US10/536,185 US53618505A US2006000530A1 US 20060000530 A1 US20060000530 A1 US 20060000530A1 US 53618505 A US53618505 A US 53618505A US 2006000530 A1 US2006000530 A1 US 2006000530A1
Authority
US
United States
Prior art keywords
rubber
tire
joints
belt
pneumatic tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/536,185
Other languages
English (en)
Inventor
Nobuyuki Hirai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Assigned to BRIDGESTONE CORPORATION reassignment BRIDGESTONE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIRAI, NOBUYUKI
Publication of US20060000530A1 publication Critical patent/US20060000530A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
    • B60C17/0018—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts two or more inserts in each sidewall portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
    • B60C17/0027—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts comprising portions of different rubbers in a single insert
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10819—Characterized by the structure of the bead portion of the tire
    • Y10T152/10828—Chafer or sealing strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10855—Characterized by the carcass, carcass material, or physical arrangement of the carcass materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10855—Characterized by the carcass, carcass material, or physical arrangement of the carcass materials
    • Y10T152/10864—Sidewall stiffening or reinforcing means other than main carcass plies or foldups thereof about beads

Definitions

  • This invention relates to a pneumatic tire built on a building drum having a basic form of substantially a cylinder, and particularly proposes a technique of largely improving a uniformity and a balance of the tire.
  • the conventional building of a green tire using a building drum is carried out by forming a green case comprised of an innerliner, a carcass, bead cores, side rubbers and the like on a building drum, transferring the green case onto another building drum, conducting a tire building so as to expand and deform a central portion of the green case in a radial direction, and affixing a previously formed belt-tread band onto an outer peripheral thereof.
  • the invention is a subject matter to solve the problems inherent to the pneumatic tire produced by using the building drums, and an object thereof is to provide a pneumatic tire largely improving the uniformity and the mass balance.
  • the pneumatic tire according to the invention comprises a carcass comprised of one or more carcass plies toroidally extending between a pair of bead cores and wound mostly at a side portion thereof around the bead core from an inside toward an outside in a widthwise direction of the tire and outward in a radial direction, a bead filler rubber arranged at an outer peripheral side of the bead core between a main body portion and a turnup portion of the carcass, an innerliner arranged at an inner face side of the carcass, a belt arranged on an outer peripheral side of a crown portion of the carcass and comprised of one or more belt layers, a tread rubber arranged on an outer peripheral side of the belt to form a treading face, a side rubber arranged on an outer face side of a side portion of the carcass to form a sidewall of the tire, in which at least one of the innerliner, the carcass ply and the belt layer is provided with a plurality of joints approximately equally positioned at approximately constant intervals in
  • the plurality of the joints through the overlap or butt joining existing in one or more layers of the innerliner, carcass ply and belt layer are equally and dispersedly positioned at the constant intervals in the peripheral direction, and these joints formed in each layer are sufficiently balanced statically and dynamically between the mutual joints, so that the joints in each layer can effectively contribute to the realization of excellent uniformity and high balance in the tire without considering the relative position of the joint between the one layer and the other layer and the like.
  • This is particularly effective when the joints are arranged in all of the innerliner, the carcass ply and the belt layer at approximately constant intervals in the peripheral direction.
  • the joints extending substantially in the peripheral direction and positioned at approximately equal intervals are formed in one or more of the tread rubber, the bead filler rubber and the side rubber, whereby joints such as butt joint portions and the like extending in the meridional direction of the tire can be eliminated from one or more layers of the tread rubber, the bead filler rubber and the side rubber and hence the excellent uniformity and high balance in the tire can be realized.
  • the joints in each rubber layer are formed substantially symmetrically with respect to an equatorial plane of the tire, whereby respective tire portions positioned across the equatorial plane can be made sufficiently homogeneous with each other.
  • the carcass ply cord is extended at a certain inclination angle with respect to the meridional direction of the tire, the joints similar to those of the belt layer as mentioned below are formed in the carcass ply
  • the cords of the belt layer are extended at a relatively small angle with respect to the equatorial plane of the tire, for example, at an angle of 10-40° crossing therewith, while a raw material for the belt layer of a given width formed by covering a plurality of belt layer cords arranged side by side with rubber becomes continuous in the extending direction of the cord. Therefore, the joints of the belt layer formed by butt-joining the raw material for the belt layer on a periphery are frequently and continuously extended at a certain inclination angle corresponding to the above angle with respect to the meridian of the tire.
  • the interval between the joints in the radially inner end portion is made approximately equal to a size obtained by multiplying or dividing a peripheral length of a circle having a diameter of 1 inch by an integral number.
  • the mutual joints in each of the innerliner and the carcass ply can be always positioned at equal intervals in the peripheral direction even in tires having any sizes.
  • the size such as rim size of a wheel rim to be mounted with the tire or the like is specified by inch as a unit, while the radially inner end portion of each of the innerliner and the carcass ply has a peripheral length substantially corresponding to the peripheral length of the rim size, so that the interval between the joints in such a portion of each of the innerliner and the carcass ply is made approximately equal to the size obtained by multiplying or dividing a standard peripheral length by an integral number when a peripheral length of a circle having a diameter of 1 inch is standard, whereby the interval between the mutual joints can be always kept constant in the peripheral direction irrespectively of the size of an approved rim.
  • the joints in each of the bead filler rubber and the side rubber are spirally extended in the radial direction of the tire and the joints in the tread rubber are helically extended in the widthwise direction of the tire.
  • one end and the other end of the spirally or helically continuing joint are positioned opposite to each other in, for example, the diameter direction of the tire, whereby the joint portion extending in the meridional direction of the tire can be effectively eliminated and the lowering of the uniformity and the balance in the product tire can be sufficiently prevented.
  • the joints in the tread rubber can be continuously formed from one side part to the other side part in the widthwise direction of the tire, or can be continuously formed from each side part in the widthwise direction of the tire to a central part in the widthwise direction of the tire.
  • the joint portion extending from the tread rubber in the meridional direction of the tire can be effectively eliminated.
  • the symmetry of the joints in the tread rubber and hence the wind-laminated state of the tread rubber material with respect to the equatorial plane of the tire can be more enhanced.
  • the tread rubber If it is intended to more improve the tire performances by constituting the tread rubber with a base rubber located at an inner layer side and a cap rubber located at an outer layer side, it is preferable that mutually independent joints arranged in intervals in a direction along an outer profile at the meridional section of the tire and extending substantially in the peripheral direction are formed in each of the base rubber and the cap rubber for clearly dividing the base rubber and the cap rubber to sufficiently develop the function of each rubber as is expected.
  • the tread rubber includes a high electrically conductive rubber existing in a middle portion in the widthwise direction of the tire and continuing over a full thickness in the radial direction of the tire
  • the high electrically conductive rubber can be strongly bonded to the adjacent tread rubber portion made of different material over sufficiently large area and the durability against accidental peeling trouble or the like of the tread rubber can be enhanced.
  • a belt reinforcing layer including cord(s) extending substantially in the peripheral direction and covering the belt over a full width thereof is arranged between the belt and the tread rubber
  • joints extending substantially in the peripheral direction at given intervals in a direction along an outer profile at the meridional section of the tire are arranged in the belt reinforcing layer, for example, by helically winding and joining a ribbon for the reinforcing layer, which is formed by coating plural aligned cords with rubber, in the widthwise direction of the tire.
  • the joint portion extending in the meridional direction of the tire can be eliminated as far as possible likewise the aforementioned joints in each of the tread rubber, the bead filler rubber and the side rubber to more effectively improve the uniformity and the balance of the tire.
  • a squeegee rubber layer is arranged on at least one of an inner face side and an outer face side of the carcass ply, or when a belt under cushion rubber is arranged on a side portion of the belt and at its inner face side, or when a tread under cushion rubber is arranged at an inner face side of the tread rubber, or when a chafer rubber is arranged on a side of the bead portion at least contacting with a rim flange, it is preferable that joints extending substantially in the peripheral direction at intervals in a direction along the outer profile at the meridional section of the tire are arranged in the squeegee rubber layer, the belt under cushion rubber, the tread under cushion rubber or the chafer rubber due to the same reasons as mentioned above.
  • the side reinforcing layer including cords extending substantially in the peripheral direction of the tire is arranged at an inner face side of the side rubber, it is preferable that the side reinforcing layer is provided with joints extending substantially in the peripheral direction at intervals in a direction along the outer profile at the meridional section of the tire due to the same reasons.
  • FIG. 1 is a partial perspective view partly shown in section of an embodiment of the invention.
  • FIG. 2 is a view illustrating an arrangement of an insert reinforcing layer and a flipper.
  • FIG. 3 is a sectionally perspective view illustrating an arrangement of a side reinforcing rubber.
  • FIG. 4 is a sectionally perspective view illustrating another arrangement of a side reinforcing rubber.
  • FIG. 5 is a view illustrating an example of the invention.
  • numeral 1 is a tread portion, numeral 2 a sidewall portion continuously extending inward from each side edge of the tread portion 1 in a radial direction, and numeral 3 a bead portion continuing from an inner peripheral side of the sidewall portion 2 .
  • a bead filler rubber 7 is arranged between a main body portion 6 a and a turnup portion 6 b of the radial carcass 6 on an outer peripheral side of the bead core 4 .
  • an innerliner 8 is arranged on an inner face side of the radial carcass 6 , while a belt 9 comprised of one or more layers, two belt layers 9 a, 9 b in the illustrated embodiment is arranged on an outer peripheral side of a crown portion of the radial carcass 6 . Furthermore, a tread rubber 10 forming a treading face is arranged on an outer peripheral side of the belt 9 , while a side rubber 11 forming a sidewall of the tire is arranged on an outer face side of a side portion of the radial carcass 6 .
  • a belt reinforcing layer 12 including, for example, organic fiber cords extending substantially in a peripheral direction and covering the belt 9 over a full width thereof is further arranged between the belt 9 and the tread rubber 10 , and a belt under cushion rubber 13 is arranged on each side portion of the belt 9 between the belt 9 and the radial carcass 6 , and a chafer rubber 14 is arranged on a side of the bead portion 13 at least contacting with a rim flange, and a side reinforcing layer 15 including cords extending substantially in the peripheral direction is arranged on an inner face side of the side rubber 11 between the main body portion 6 a and the turnup portion 6 b of the radial carcass 6 and the bead filler rubber 7 .
  • numeral 16 is a canvas chafer arranged between the innerliner 8 and the radial carcass 6 in the vicinity of the bead core 4 .
  • the tread rubber 10 is further constructed with a base rubber 10 a located at an inner layer side and a cap rubber 10 b located at an outer layer side and further a high electrically conductive rubber 10 c existing in a widthwise middle portion of the treading face and continuing over a full thickness of the tread rubber 10 in a radial direction of the tire.
  • plural joints positioned at approximately constant intervals in the peripheral direction and formed through butt joining, overlap joining or the like as shown by a thin line in the figure are arranged in each of the innerliner 8 , the carcass ply 5 and the belt layers 9 a, 9 b.
  • the interval between the joints continuously extending substantially in the meridional direction of the tire in each of the innerliner 8 and the carcass ply 5 is made an equal interval at an inner end part in the radial direction thereof substantially corresponding to a size obtained by multiplying or dividing a peripheral length of a circle having a diameter of 1 inch by an integral number.
  • the plural joints in the belt layers 9 a, 9 b are generally extended at a given inclination angle with respect to the meridian of the tire in connection with the required extending angle of the cord in the belt layer with respect to an equatorial plane of the tire.
  • each of the tread rubber 10 , the bead filler rubber 7 and the side rubber 11 are arranged joints continuing substantially in the peripheral direction, which are positioned at intervals in a direction along an outer profile at the meridional section of the tire. That is, the joints are positioned at intervals in the widthwise direction of the tire in case of the tread rubber 10 , and at intervals in the radial direction of the tire in case of the bead filler rubber 7 and the side rubber 11 .
  • each of the joints continuing in the peripheral direction is preferable to be formed continuously or near to continuity as far as possible from one side to the other side in the widthwise direction of the tire or from an inner edge to an outer edge in the radial direction of the tire in each of the rubbers 10 , 7 and 11 in order to avoid the formation of separate joints having an extending component in the meridional direction of the tire, which becomes a factor of lowering the uniformity and the balance of the tire, as far as possible.
  • the joints in the tread rubber 10 are helically extended in the widthwise direction of the tire, and the joints in each of the bead filler rubber 7 and the side rubber 11 are spirally extended in the radial direction of the tire.
  • the joints in the tread rubber 10 are more preferable to be continued from one side part to the other side part in the widthwise direction of the tire without interruption.
  • the tread rubber 10 having a thick thickness is formed by helically winding a narrow-width rubber ribbon, in order to prevent a fear in the winding of the rubber ribbon such as accidental winding break, change of winding posture or the like and hence a disruption of balance between tire portions of a product tire with respect to the equatorial plane due to the winding break or the like, it is preferable that the rubber ribbon is helically wound from each side part in the widthwise direction of the tire to a widthwise central part, whereby helically extending joints of the tread rubber 10 are disrupted in the widthwise central part of the tread once.
  • the tread rubber 10 is constituted with base rubber 10 a and the cap rubber 10 b or is further added with the high electrically conductive rubber 10 c.
  • each of the base rubber 10 a and the cap rubber 10 b can be formed en suite with continuing the joints from one side part to the other side part, or may be formed with interruption at the central part in the widthwise direction of the tread once.
  • the joints of the high electrically conductive rubber 10 c are preferable to be positioned at intervals in the widthwise direction and the radial direction of the tire, respectively, and extended en suite substantially in the peripheral direction.
  • the joints of these rubbers are positioned at intervals in a direction along an outer profile at the meridional section of the tire and continuously extended substantially in the peripheral direction, whereby the excellent uniformity and balance of a product tire can be advantageously guaranteed while eliminating the formation of joints having an extending component in the meridional direction of the tire as far as possible.
  • the joints positioned at intervals in the widthwise direction of the tire and continuously extending substantially in the peripheral direction are formed en suite in the belt reinforcing layer 12 by helically and continuously winding a reinforcing ribbon made by covering a plurality of aligned cords with rubber from one side part to the other side part in the widthwise direction of the tire, and the joints positioned at intervals in the radial direction of the tire and continuously extending substantially in the peripheral direction are formed en suite in the side reinforcing layer 15 by spirally winding a reinforcing ribbon made by covering a plurality of aligned cords with rubber from an inner peripheral side to an outer peripheral side or in a direction opposite thereto at a given zone in the radial direction from the same reasons as mentioned above.
  • the side reinforcing layer 15 may be arranged at an outer face side of the bead filler rubber 7 or at an outer face side of the turnup portion 6 b of the radial carcass 6 or an outward side of the turnup portion 6 b in the radial direction instead of the illustrated embodiment.
  • an insert reinforcing layer 16 in which organic fiber cords or steel cords are extended at an inclination angle of 30-70° with respect to the meridian of the tire may be arranged at an outer face side or an inner face side of the bead filler rubber 7 as shown in FIGS. 2 ( a ), ( b ). Further, a flipper 17 enveloping the bead core 4 and the bead filler rubber 7 with the same extending organic fiber cords such as nylon cords may be arranged as shown by a schematically section view in FIG. 2 ( c ).
  • FIG. 3 is a view illustrating another embodiment, in which a side reinforcing rubber 18 having substantially a crescent shape at the meridional section of the tire is arranged at a region, for example, from the bead portion 3 to the tread portion 1 in the side portion of the tire between the inner liner 8 and the carcass ply 5 , and also joints through butt joining, overlap joining or the like are arranged in the side reinforcing rubber 18 so as to position at intervals in a direction along the outer profile at the meridional section of the tire and extend substantially in the peripheral direction.
  • joints extending in the meridional direction of the tire can be advantageously eliminated from the side reinforcing rubber 18 , which can guarantee the improvement of the uniformity and the mass balance.
  • FIG. 4 shows a case that the side rubber is constituted with two kinds of black rubber and white rubber.
  • the joints positioned at intervals in a direction along the outer profile at the meridional section of the tire and extending substantially in the peripheral direction are formed spirally in the radial direction in each of white rubber 11 a arranged in a middle part of the sidewall portion 2 and black rubbers 11 b arranged adjacent to inner and outer sides of the white rubber 11 a in the radial direction.
  • joints extending in the meridional direction can also be effectively eliminated from the side rubber 11 .
  • a border line between the white rubber 11 a and the black rubber 11 b extends in a direction that a width of the white rubber 11 a in the radial direction of the tire gradually narrows toward the outer surface side of the side rubber 11 as shown in FIG. 4 ( a ) when the white rubber 11 a is first arranged and thereafter the black rubber 11 b is arranged, and extends in a direction that the width gradually widens toward the outer surface side of the side rubber 11 as shown in FIG. 4 ( b ) when the white rubber 11 a is arranged afterward.
  • the white rubber 11 a is not required to have comparatively a thickness though it is not shown, it is possible to arrange the white rubber so as to overlap with a given region of an outer surface of the side rubber formed as shown in FIG. 1 .
  • tires having a structure according to the invention and a tire size of 235/45 ZR17 in which joints positioned at approximately constant intervals in the peripheral direction are arranged in at least one of the innerliner, the carcass ply and the belt layer and joints positioned at intervals in a direction along an outer profile at the meridional section of the tire and continuously extending substantially in the peripheral direction are formed in each of the tread rubber, the bead filler rubber and the side rubber, and a radial force variation (hereinafter referred to as RFV) is measured as an indication of the uniformity and a static balance is measured as an indication of the balance to obtain results shown in FIG. 5 .
  • RFV radial force variation
  • the static balance is determined by setting the tire onto a balancer and attaching a weight to a side portion corresponding to a light point position of the tire so as to render an unbalance quantity into zero to measure a balance as a product of mass of the weight (kg) and a distance from a center of the balance to the attaching position of the weight (cm).
  • the conventional tire in FIG. 5 is a tire built on a building drum according to the building method described in the conventional technique in which each of the innerliner, the carcass ply, the bead filler rubber, the side rubber and the base rubber and cap rubber of the tread rubber has a joint formed at one place in the peripheral direction through overlap joining and extending substantially in the meridional direction of the tire and continuing over a full peripheral length thereof and also each of the belt layers has joints extending at a given inclination angle with respect to the meridian of the tire and the same joint extending at one place in the peripheral direction and substantially in the meridional direction and formed through the overlap joining.
  • 17 joints positioned at approximately equal intervals in the peripheral direction and extending in the meridional direction of the tire are arranged in only the innerliner and the same joints as in the conventional tire are arranged in each of the carcass ply and the belt layer.
  • 17 joints extending in the meridional direction of the tire are arranged in only the carcass ply and each of the innerliner and belt layer has the same structure as in the conventional tire.
  • 22 joints extending obliquely with respect to the meridional direction of the tire are arranged in only the belt layer and the same joints as in the conventional tire are arranged in each of the innerliner and carcass ply.
  • the example tire 4 has a structure shown in FIG. 1
  • the example tire 5 has a structure of FIG. 1 added with the side reinforcing rubber shown in FIG. 3
  • the example tire 6 has a structure of FIG. 1 provided with the insert reinforcing layer shown in FIG. 2 ( a ) instead of the side reinforcing layer
  • the example tire 7 is different from the example tire 4 in only a point that the side rubber is constituted with white rubber and black rubber as shown in FIG. 4 ( a ).
  • example tires particularly example tires 4 - 7 can advantageously improve both of RFV and static balance as compared with the conventional tire.
  • plural joints positioned at approximately equal intervals in the peripheral direction are equally dispersed and arranged in at least one of the innerliner, the carcass ply and the belt layer to enhance the homogeneity of the tire in the peripheral direction
  • further joints positioned at intervals in a direction along the outer profile at the meridional section of the tire and continuously extending substantially in the peripheral direction are arranged in at least one of the tread rubber, the bead filler rubber and the side rubber to eliminate the formation of joints having an extending component in the meridional direction of the tire as far as possible and prevent the lowering of various balances, whereby the uniformity and the balance in the tire can be largely improved as compared with the conventional tire built on the building drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Tyre Moulding (AREA)
US10/536,185 2002-11-25 2003-11-25 Pneumatic tire Abandoned US20060000530A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002341177A JP4256149B2 (ja) 2002-11-25 2002-11-25 空気入りタイヤ
JP2002-341177 2002-11-25
PCT/JP2003/015042 WO2004048129A1 (ja) 2002-11-25 2003-11-25 空気入りタイヤ

Publications (1)

Publication Number Publication Date
US20060000530A1 true US20060000530A1 (en) 2006-01-05

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US10/536,185 Abandoned US20060000530A1 (en) 2002-11-25 2003-11-25 Pneumatic tire

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US (1) US20060000530A1 (ja)
EP (1) EP1584493B1 (ja)
JP (1) JP4256149B2 (ja)
AU (1) AU2003284693A1 (ja)
DE (1) DE60323154D1 (ja)
WO (1) WO2004048129A1 (ja)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
US20080314494A1 (en) * 2004-11-04 2008-12-25 Bridgestone Corporation Method of Producing Tire
US20100051164A1 (en) * 2008-08-29 2010-03-04 Robert Anthony Neubauer Modular ply tire with dissimilar materials
US20100154954A1 (en) * 2008-12-18 2010-06-24 The Yokohama Rubber Co., Ltd. Pneumatic tire and method for manufacturing the same
US20100307656A1 (en) * 2007-04-23 2010-12-09 Societe De Technologie Michelin Tire for Vehicle Including Reinforcements in the Sidewalls
US20170305202A1 (en) * 2014-11-10 2017-10-26 Sumitomo Rubber Industries, Ltd. Pneumatic tire manufacturing method, and pneumatic tire
US20170313006A1 (en) * 2014-11-10 2017-11-02 Sumitomo Rubber Industries, Ltd. Pneumatic tire manufacturing method, and pneumatic tire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100126646A1 (en) * 2005-07-28 2010-05-27 Toyo Tire & Rubber Co., Ltd. Method and apparatus for producing tire inner liner members, and tire having inner liner
JP4840965B2 (ja) * 2005-08-23 2011-12-21 東洋ゴム工業株式会社 空気入りタイヤ及び空気入りタイヤの製造方法
US8202381B2 (en) 2006-01-20 2012-06-19 Toyo Tire & Rubber Co., Ltd. Radial tire and method of manufacturing the same
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JP2004175157A (ja) 2004-06-24
DE60323154D1 (de) 2008-10-02
AU2003284693A1 (en) 2004-06-18
EP1584493A1 (en) 2005-10-12

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